Locomotive-exhaust-nozzle covering



Jan. 12 1926.

A. G. MACHESNEY LDCQMOTIVE EXHAUST NOZZLE COVERING Filed March 13 1922 2Sheets-Sheet 1 Jan. 12 1926. 1,569,515

I A. G. MACHESNEY LQCOMOTIVE EXHAUST NOZZLE COVERING Filed March 15.1922 v 2 Sheetsw-Sheet 2 R A HIP nill' M v awuwdcoz Patented Jan. 12,1926.

u-mirso STATES ANDREW G. MACHES'NKEY, onnnrruozr, Mien-roan, Assienon Tonntrnorr LUBRICA- TOR ooMrANxoF DETROIT, MlGHiGAN, ACORPORATION orMICHIGAN.

LOGQMOTIVE-EXHAUST-NOZZLE COVERING.

To all whom) it may concern:

Be it known that I, ANDREW G. l\/IAOHES- NEY, a citizen of the UnitedStates of America, residing at Detroit, in the county of Wayne and Stateof Michigan, have invented certain new and useful Improvements inLocomotive-Exhaust-Nozzle Coverings, of which the following is aspecification, reference being had therein to the accompanying drawings.

The invention relates to exhaust nozzles for locomotives through whichthe exhaust steam is discharged into the stack to create a draft. It isthe object of the invention to provide means for preventing the drawinginto said nozzle of smoke, gas and cinders, which frequently occurs whenthe locomotive is drifting with the steam shut off under suchconditions, the pistons and cylinders constituting in effect a pump,which, being in communication with the smoke box through the nozzle,will draw in smoke, gas and cinders to the detriment of the valves,pistons and other working parts. The invention therefore consists in thenovel means for avoiding the detrimental action above referred to andconsists in the con struction as hereinafter set forth.

In the drawings:

Figure l is a cross-section through a locomotive smoke box showing thenozzle with my improvement applied thereto;

Figure 2 is a longitudinal section therethrough;

Figure 3 is a cross-section;

Figure 4 is a plan view of the protecting device as applied to a doublenozzle;

Figure 5 is an end elevation thereof.

A is the exhaust nozzle in a locomotive smoke box B and which isdirected upward into the flaring lower end of the stack C.

My improvement consists essentially in an automatically operatingclosure E for the nozzle which is opened by the discharge of steam. Asshown and preferably applied, this closure is in the form of a hingedcover plate attached to the discharge end of the nozzle and so balancedthat it will be closed by gravity, or by the vibration of parts, or bysuction from the cylinders, but will be moved by the discharging steamout of the path thereof.

As shown in detail, F is a flange which is usually provided on thenozzles. G is an exchangeable nozzle tip, which is usually provided bylocomotive builders to vary the action of the discharge jet. This tip Ipreferably employ as a seat for the cover E, while the hinge for thecover is attached to the flange F. As shown, H are eyebolts secured tothe flange F by the nuts I. J is a hinged lug extending rearward fromthe cover E and K is a cross bolt or pin forming the hinge connectionbetween the lug J and eyebolts H. The lug J is preferably cut away asindicated at J, so that any cinders or other dirt collecting on thehinge will not bind the same. There is also provided the stop lug L forarresting movement of the cover after the opening of the nozzle and thebalance of the construction is such that it is in unstable equilibriumin this arrested position. Therefore, the cover will automatically closeby gravity, or by suction, and will remain open only so long as steam isdischarging from the nozzle.

In order that the engineer may be sure of the position of the cover, Ipreferably provide an indicator which as shown comprises a rod Mattached to the cover and projecting outward beyond the shell of thesmoke box. At the outer end of this rod is a ball N which is in a pocket0 when the cover is closed, but is projected out from said pocket, asindicated in dotted lines, when the cover is open. Therefore theengineer will know at a glance whether the cover plate is open orclosed.

In many locomotives the exhaust from both cylinders is conducted into asingle nozzle, but in some constructions there is provided a doublenozzle. For the latter construction I employ two cover plates, as shownin Figs. 3 and 4, and which are respectively turned up on opposite sidesof the nozzles when in open position.

What I claim as my invention is:

1. The combination with a locomotive exhaust discharge nozzle, of acover plate adapted to seat on the discharge end of said nozzle, ahinged connection between said cover plate and nozzle permitting theopening of the same by the discharge of steam, and a stop for limitingthe opening movement of said cover to a position fro-m which it willautomatically close.

2. The combination with a locomotive exhaust discharge nozzle providedwith a discharge tip, of a cover plate adapted to seat upon saiddischarge tip, a hinged connection between said cover and the nozzlepermitting of the opening of the former by the discharge of steam, and alug for arresting the opening movement of said cover, the balance of theparts being such that the cover will automatically close from itsarrested position.

3. The combination with a locomotive exhaust discharge nozzle having aflange adjacent to its upper end, of a cover plate for closing thedischarge end of said nozzle, eyebolts secured to said flange, a hingedconnection between said cover plate and eyebolts permitting of theopening of the cover by the discharge of steam, and means forautomatically closing said cover.

In testimony whereof I afiix my signature.

ANDREW G. MAOHESNEY.

